Don't have the space I need

I feel depressed because my father is a domineering person who is unreasonable because he has old-age dementia. My mother who was a social worker who worked with dementia clients has known it for years.

He's always been a very active person and he roams around the house like he owns the place, hogs the kitchen, leaves crumbs all over I'm allergic to in the kitchen and needs almost constant attention from my mother, and behaves in a moody way.

My mental health is shot to pieces and I can't even feed myself properly sometimes. Don't know what to do. Twice I got a flat for myself and took a housing association one each time because I'm not able to work for mental health reasons. Both times I had neighbours who were drug users who I didn't feel safe living next to, with lots of noise and intimidating visitors coming round ot them.

I was an alcohol for years to numb out the pain of all this but haven't drank alcohol for over 6 weeks now. I feel though at times I'm just waiting, there's little I can do. I don't think I can fix my health properly until I have a home I feel safe and secure in, so I can have the time and space in the kitchen I need to make the foods I need for my specialised diet to heal my gut, which has an infection.

So where I head from here, no idea. I looked at renting a spare room in someone's house on websites and the prices people were charging were too much for me, as I need a lot of money for my diet, I spend a lot of my income on it. It feels like I'm being blocked on all sides from gaining access to what I need.